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r <br /> PUBLIC HEALTH SERVICE' S S QPqu� a0 <br /> SAN JOAQUIN.COUNTY <br /> r <br /> ENVIRONMENTAL HEALTH DIVISJON w= <br /> Ernest M. Fujimoto, M. Lt,, M_P.H.,Acting Health Officerapp <br /> 304 E. Weber Ave.,Third Floor • P. O. Box 388 • Stockton, CA 95201.0388 t%GD'gN P <br /> 209/468-3420 <br /> MAlLEU DEC 0 51995 <br /> THOMAS J NOKES <br /> 1650 PARK ST <br /> AT.AMEDA CA 94501 <br /> RE: DISCOVERY CHEVROLET SITE CODE: 2595 <br /> 1615 1ri%FST 11TH STREET <br /> TRACY CA 95376 <br /> San Joaquin Counry Public Health Services, Environmental Health Division has reviewed the <br /> October 25, 1995 workplan and the November 15, 1995 executive summary, prepared by <br /> Horizon Environmental Inc., for the above referenced site. <br /> In the workplan and the executive summary, horizon Environmental describes an over <br /> excavation of approximately 400 cubic yards of soil from the former gasoline underground <br /> storage tank location. The excavation will be approximately I I feet deep by 25 feet wide, by <br /> 35 feet long. Contaminated soil will_be transported to a landfill. The excavation will be back <br /> filled with imported fill and resurfaced for traffic the following Monday morning. <br /> During the November 7, 1995 meeting referenced in the workplarf, this interim corrective action <br /> was approved with the following conditions: Ms. Nokes will be notifiedprior to implementation <br /> of the workplan and will post the site, the extraction of 5.000 gallons of groundwater in addition <br /> to the soil source removal is approved, imported fill will be low permeability material, MW$1 <br /> may be destroyed during the over excavation without a permit as long as the remainder casing <br /> below f= groundwater is back filled with a cement or bentonite slurry tinder observation by <br /> PHS/E:HD staff, fourth quarter monitoring may be delayed until after the excavation is <br /> completed. <br /> pHs/7ID approves this interim corrective action to proceed as a proper method of source <br /> removal of soil and groundwater contamination. <br /> Replacement wells, soil borings, or push paint iocadous will be determined following Horizons <br /> evaluation of the soil results from the excavation. The need for additional assessment of the <br /> former waste oil tank location will also bti determined following the over excavation. <br /> A Division of San Joaquin County Health Care Services <br /> ZZiB'd INS3fbW S?J3dON WH£S:TT 96. 92 034 <br />